an innovative use of renewable ground heat for insulation in low exergy building systems一个创新的使用可再生地面热(火用)构建系统的绝缘低.pdfVIP

an innovative use of renewable ground heat for insulation in low exergy building systems一个创新的使用可再生地面热(火用)构建系统的绝缘低.pdf

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an innovative use of renewable ground heat for insulation in low exergy building systems一个创新的使用可再生地面热(火用)构建系统的绝缘低

Energies 2012, 5, 3149-3166; doi:10.3390/en5083149 OPEN ACCESS energies ISSN 1996-1073 /journal/energies Article An Innovative Use of Renewable Ground Heat for Insulation in Low Exergy Building Systems Forrest Meggers 1,*, Luca Baldini 2 and Hansjürg Leibundgut 2 1 Singapore-ETH Centre, Future Cities Laboratory, Low Exergy Module, Singapore 118999, Singapore 2 ETH Zurich, Institute for Technology in Architecture, Building Systems, Zurich 8093, Switzerland; E-Mails: baldini@arch.ethz.ch (L.B.); leibundgut@arch.ethz.ch (H.L.) * Author to whom correspondence should be addressed; E-Mail: meggers@arch.ethz.ch; Tel.: +41-44-633-29-91. Received: 12 June 2012; in revised form: 12 July 2012 / Accepted: 13 July 2012 / Published: 20 August 2012 Abstract: Ground heat is a renewable resource that is readily available for buildings in cool climates, but its relatively low temperature requires the use of a heat pump to extract it for heating. We developed a system that uses low temperature ground heat directly in a building wall to reduce transmission heat losses. The Active Low Exergy Geothermal Insulation Systems (ALEGIS) minimizes exergy demand and maximizes the use of renewable geothermal heat from the ground. A fluid is pumped into a small pipe network in an external layer of a wall construction that is linked to a ground heat source. This decouples the building from the outside t

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